Flame princsess cheating

I just have question, if anyone here is a fan of the show, they know that Finn can only touch or "interact" with flame princess only if he has that flame resistant suit or with the help from flame bits, but that makes his skin blue. Here he has no suit or blue skin, so shouldn't Finn be burnt to a crisp right now?

Oh yeah that's very hot

I'm just gonna say this now. I was always a fan of their relationship and nothing else.